Datasheet

32
AT89C5132
4173C–USB–07/04
MMC Interface
Definition of Symbols Table 9. MMC Interface Timing Symbol Definitions
Timings Table 10. MMC Interface AC Timings
V
DD
= 2.7 to 3.3 V, T
A
= -40 to +85°C, CL ≤ 100pF (10 cards)
Waveforms Figure 10. MMC Input Output Waveforms
Signals Conditions
C Clock H High
D Data In L Low
O Data Out V Valid
X No Longer Valid
Symbol Parameter Min Max Unit
T
CHCH
Clock Period 50 ns
T
CHCX
Clock High Time 10 ns
T
CLCX
Clock Low Time 10 ns
T
CLCH
Clock Rise Time 10 ns
T
CHCL
Clock Fall Time 10 ns
T
DVCH
Input Data Valid to Clock High 3 ns
T
CHDX
Input Data Hold after Clock High 3 ns
T
CHOX
Output Data Hold after Clock High 5 ns
T
OVCH
Output Data Valid to Clock High 5 ns
T
IVCH
MCLK
MDAT Input
T
CHCH
T
CLCX
T
CHCX
T
CHCL
T
CLCH
MCMD Input
T
CHIX
T
OVCH
MDAT Output
MCMD Output
T
CHOX